Radial tire for motor vehicles

Abstract

A radial tire (20) for motor vehicles, on which a body ply (6) presents two lateral portions (8) turned substantially 360° about respective beads (4) and joined, by an end portion (9), to the outer surface of a center portion (7) of the body ply (6) immediately over the beads (4); each lateral portion (8) of the body ply (6) turned about the bead (4) being gripped between an innerliner (10) and an outer abrasion strip (12) integral with each other; and each abrasion strip (12) presenting a section of varying thickness, to compensate for the absence of a bead filler.

What is claimed is: 
     
       1. A radial tire for motor vehicles, said tire comprising two metal beads; a body ply comprising two lateral portions, each turned about a respective metal bead and joined by an end portion to the outer surface of a main portion of the body ply over a respective bead; and an innerliner and outer abrasion strip integral with each other, and turned about each lateral portion of said body ply; characterized by the fact that each lateral portion of said body ply is turned substantially 360° about a respective metal bead; said end portion of each lateral portion of said body ply joining with the main portion of said body ply immediately over the respective bead; said abrasion strip presenting a section varying in thickness, with a portion of said abrasion strip being located substantially radially outwards of the respective bead and in contact with the respective end portion of said body ply, with no bead filler being provided. 
     
     
       2. A tire as claimed in claim 1 characterized by the fact that each abrasion strip comprises a first and second portion, the average thickness of the first portion being less than that of the second portion; said first portion of each abrasion strip bring turned substantially in the form of a U-shape about the respective bead, with said second portion of each abrasion strip extending outwards of the respective bead.